/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iotdb.db.mpp.execution.operator.schema;

import org.apache.iotdb.commons.exception.MetadataException;
import org.apache.iotdb.commons.path.PartialPath;
import org.apache.iotdb.db.metadata.plan.schemaregion.impl.read.SchemaRegionReadPlanFactory;
import org.apache.iotdb.db.metadata.plan.schemaregion.result.ShowTimeSeriesResult;
import org.apache.iotdb.db.metadata.template.Template;
import org.apache.iotdb.db.mpp.common.header.ColumnHeader;
import org.apache.iotdb.db.mpp.common.header.ColumnHeaderConstant;
import org.apache.iotdb.db.mpp.execution.driver.SchemaDriverContext;
import org.apache.iotdb.db.mpp.execution.operator.OperatorContext;
import org.apache.iotdb.db.mpp.plan.planner.plan.node.PlanNodeId;
import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType;
import org.apache.iotdb.tsfile.read.common.block.TsBlock;
import org.apache.iotdb.tsfile.read.common.block.TsBlockBuilder;

import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

public class TimeSeriesSchemaScanOperator extends SchemaQueryScanOperator {
    private final String key;
    private final String value;
    private final boolean isContains;

    // if is true, the result will be sorted according to the inserting frequency of the timeseries
    private final boolean orderByHeat;

    private final Map<Integer, Template> templateMap;

    private final List<TSDataType> outputDataTypes;

    public TimeSeriesSchemaScanOperator(
            PlanNodeId planNodeId,
            OperatorContext operatorContext,
            int limit,
            int offset,
            PartialPath partialPath,
            String key,
            String value,
            boolean isContains,
            boolean orderByHeat,
            boolean isPrefixPath,
            Map<Integer, Template> templateMap) {
        super(planNodeId, operatorContext, limit, offset, partialPath, isPrefixPath);
        this.isContains = isContains;
        this.key = key;
        this.value = value;
        this.orderByHeat = orderByHeat;
        this.templateMap = templateMap;
        this.outputDataTypes =
                ColumnHeaderConstant.showTimeSeriesColumnHeaders.stream()
                        .map(ColumnHeader::getColumnType)
                        .collect(Collectors.toList());
    }

    public String getKey() {
        return key;
    }

    public String getValue() {
        return value;
    }

    public boolean isContains() {
        return isContains;
    }

    public boolean isOrderByHeat() {
        return orderByHeat;
    }

    @Override
    protected List<TsBlock> createTsBlockList() {
        try {
            List<ShowTimeSeriesResult> schemaRegionResult =
                    ((SchemaDriverContext) operatorContext.getInstanceContext().getDriverContext())
                            .getSchemaRegion()
                            .showTimeseries(
                                    SchemaRegionReadPlanFactory.getShowTimeSeriesPlan(
                                            partialPath, templateMap, isContains, key, value, limit, offset, false))
                            .left;
            return SchemaTsBlockUtil.transferSchemaResultToTsBlockList(
                    schemaRegionResult.iterator(), outputDataTypes, this::setColumns);
        } catch (MetadataException e) {
            throw new RuntimeException(e.getMessage(), e);
        }
    }

    private void setColumns(ShowTimeSeriesResult series, TsBlockBuilder builder) {
        builder.getTimeColumnBuilder().writeLong(0);
        builder.writeNullableText(0, series.getPath());
        builder.writeNullableText(1, series.getAlias());
        builder.writeNullableText(2, series.getDatabase());
        builder.writeNullableText(3, series.getDataType().toString());
        builder.writeNullableText(4, series.getEncoding().toString());
        builder.writeNullableText(5, series.getCompressor().toString());
        builder.writeNullableText(6, mapToString(series.getTag()));
        builder.writeNullableText(7, mapToString(series.getAttribute()));
        builder.writeNullableText(8, series.getDeadband());
        builder.writeNullableText(9, series.getDeadbandParameters());
        builder.declarePosition();
    }

    private String mapToString(Map<String, String> map) {
        if (map == null || map.isEmpty()) {
            return null;
        }
        String content =
                map.entrySet().stream()
                        .map(e -> "\"" + e.getKey() + "\"" + ":" + "\"" + e.getValue() + "\"")
                        .collect(Collectors.joining(","));
        return "{" + content + "}";
    }
}
